This is the Koenigsegg One:1, and it's supposed to go 273.4 mph

Fear the colon.

This is the One:1. It's the first self-proclaimed 'megacar.' It's 1340 kg (that's 2954 lbs), makes 1340 hp, and Koenigsegg anticipates it will be the fastest homologated production car, with a top speed of 273.4 mph.

Start by forgetting all the "dry weight" semantics: That 1340 kg is the One:1's actual curb weight, meaning it includes the burden of all necessary fluids and an average-sized driver. This is a true one-to-one power-to-weight homologated production car—the first ever made, according to Koenigsegg. While details on the One:1's oily bits are yet to be released, the Swedish automaker does note a new 'patented variable turbo housing,' so we'd guess it's the familiar 5.0-liter twin-turbo V8.

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"Koenigsegg"

That's where it starts getting a little sci-fi

Though it's technically derived from the Agera, the One:1's carbon chassis and body are new, made some 20 percent lighter by the use of a different, highly-elastic composite—the stuff used on satellites and spaceships (that's M46J and M55J high modulus fibers, for all you engineers). That 'patented variable turbo housing' is 3D-printed, as is the One:1's titanium exhaust. Not only can this car manage 2 g's of lateral acceleration, but it produces half its own weight in downforce at 160 mph. That's due to its active chassis and aero, both of which are GPS-controlled. Oh, and it's got an in-car 3G connection for telemetry, performance, lap times, and software upgrades.